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What the heck are these power pulley bolts referred to as? by Patrick
Started on: 04-19-2014 02:14 AM
Replies: 9 (320 views)
Last post by: Patrick on 04-19-2014 04:40 PM
Patrick
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Report this Post04-19-2014 02:14 AM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
This isn't the most technical of questions...

I was able to grab a new set of power pulleys off eBay for next to nothing, so I thought I'd take a chance and see if they do anything for my 5-spd '88 Formula (which I'll also be autocrossing).

I need the four bolts that hold the one pulley onto the harmonic balancer. I can't use the factory bolts as the pulley diameter is smaller and the regular bolts won't fit.

What the heck is this style of bolt referred to as? An Allen wrench is used on them, but does this style of bolt have a proper name? The big box hardware stores around here don't carry metric bolts like these.

This is an image that was originally posted by Arn. Those are the four bolts that I need. What are they called... so that I can find some like them?

[This message has been edited by Patrick (edited 04-19-2014).]

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hiwil88formula
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Report this Post04-19-2014 02:40 AM Click Here to See the Profile for hiwil88formulaClick Here to Email hiwil88formulaSend a Private Message to hiwil88formulaEdit/Delete MessageReply w/QuoteDirect Link to This Post
Hex head bolts.
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Patrick
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Report this Post04-19-2014 02:50 AM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by hiwil88formula:

Hex head bolts.


But look what comes up in a search...



Most of those examples are not what I want. Is there a term that narrows it down more?
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hiwil88formula
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Report this Post04-19-2014 03:13 AM Click Here to See the Profile for hiwil88formulaClick Here to Email hiwil88formulaSend a Private Message to hiwil88formulaEdit/Delete MessageReply w/QuoteDirect Link to This Post
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Chris_narf
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Report this Post04-19-2014 03:36 AM Click Here to See the Profile for Chris_narfSend a Private Message to Chris_narfEdit/Delete MessageReply w/QuoteDirect Link to This Post
Well, as luck would have it, I think I have the exact same pulley sitting in a box in the basement w/ the bolts.
Bolt type: Socket Cap
Grade: 8
Length: 1 1/4"
Threads: 18
Drive size: 5/16" or M8
Thread Type: Coarse

Looks very very similar to this:
https://www.boltdepot.com/P...ls.aspx?product=5037

You'll also need the smaller belt to go with it. Mine used a Gates Micro-V K050385

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-Chris
'85 V6 SE 4sp (SOLD)
'88 GT - Series 3 SC3800 w/ 3.5" pulley, 1.8" rockers, 3" exhaust, 3.5" intake, 3.29 gearing. Installed and tuned by Sinister Performance
'99 Kawasaki Vulcan 500, owned since new
'03 Sentra SE-R Spec V (Prepping to sell)
'09 G37x Sedan w/ Premium & Nav (wife's car)
'13 G37xS Sedan (new daily driver)

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fierosound
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Report this Post04-19-2014 05:26 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
Socket Head bolt or Socket Head cap screw

Fuller Metric
http://www.fullermetric.com...ts/socket/index.aspx

B.C. Fasteners
http://www.bcf2000.ca/

FABORY
http://www.fabory.com/en/ca...Id=fabory_0000092195


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[This message has been edited by fierosound (edited 04-19-2014).]

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Report this Post04-19-2014 07:01 AM Click Here to See the Profile for Back On HolidayClick Here to Email Back On HolidaySend a Private Message to Back On HolidayEdit/Delete MessageReply w/QuoteDirect Link to This Post
If those links don't help you, I find Mcmaster Carr very helpful even if you don't buy from there, the ease of finding what you need/identify is awesome

http://www.mcmaster.com/#screws/=rlpkva
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Purple86GT
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Report this Post04-19-2014 07:49 AM Click Here to See the Profile for Purple86GTClick Here to Email Purple86GTSend a Private Message to Purple86GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
Allen head bolts. VWs and Audis are littered with them. Go to any junk yard and get any size you need of a VW.. PS: On a VW the heads are all METRIC. and the popular sizes are 5mm and 7mm.

Cheers!
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Blacktree
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Report this Post04-19-2014 09:34 AM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeEdit/Delete MessageReply w/QuoteDirect Link to This Post
They're commonly called Allen head bolts or socket head cap screws.
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Patrick
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Report this Post04-19-2014 04:40 PM Click Here to See the Profile for PatrickClick Here to Email PatrickSend a Private Message to PatrickEdit/Delete MessageReply w/QuoteDirect Link to This Post
Hey guys, thanks very much for the links to all those sites with examples of these bolts. Much appreciated.

 
quote
Originally posted by Purple86GT:

Allen head bolts. VWs and Audis are littered with them. Go to any junk yard and get any size you need of a VW.. PS: On a VW the heads are all METRIC. and the popular sizes are 5mm and 7mm.


Being the thifty guy I am, I like the sound of that. Always looking for an excuse to poke around the wrecking yards!

 
quote
Originally posted by Chris_narf:

You'll also need the smaller belt to go with it. Mine used a Gates Micro-V K050385


Fitting a belt for mine is a bit complicated, as not only will I be using a smaller crank pulley and a larger alternator pulley... but I've also got Dodgerunner's auto-tensioner installed. The belt that's normally used with his tensioner is a K050450 (45"). As near as I can determine (using a wire for measuring), I'll now need a K050420 (42") belt.

To give all of you from the States an idea of how much Canadians get ripped off with auto parts prices here, the belt I need at Lordco (a large auto parts supply company) lists at $38.89. With their car club "discount", the belt can be bought there for $27.22, plus 12% tax. So I checked out eBay. Glad I did. I bought a nice new Goodyear Gatorback belt for $5.60... which included shipping!

[This message has been edited by Patrick (edited 04-19-2014).]

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